<template>
  <div>
       <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
        <div id="main" style="width: 600px;height:400px;"></div>
    </el-card>
  </div>
</template>

<script>
import echarts from 'echarts'
import _ from 'lodash'
export default {
  data() {
    return {
        options : {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
    }
  },
  //此时页面上的基本dom已经渲染好了，这时候才可以初始化echarts
  async mounted() {
      // 基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

        const {data:res} = await this.$http.get(`reports/type/1`);
        if(res.meta.status != 200 ) return this.$message.error('数据获取失败')
        const result = _.merge(res.data, this.options)
        // 使用刚指定的配置项和数据显示图表。
        myChart.setOption(result);
  },
  methods: {

  },
  components: {

  }
}
</script>

<style lang='less' scoped>
div#main{
    margin: 5px auto;
}
</style>
